#include <string.h>
#include <stdio.h>

void run()
{

    for (int i = 4; i <= 13; i++) {
    digitalWrite(i, HIGH);
    delay(100);
    digitalWrite(i, LOW);
  }
  for (int i = 12; i > 4; i--) {
    digitalWrite(i, HIGH);
    delay(100);
    digitalWrite(i, LOW);
  }
}

char ch;
char buf[100];
int c=0;
void setup() {
  Serial.begin(115200);
  Serial. print("Dj control - The Bits Master\n");
  for (int i = 4; i <= 13; i++) {
    pinMode(i, OUTPUT);
  }
}

void loop() {

 
  if(Serial.available())
  {
    ch=Serial.read();
    Serial.print(ch);
    if(ch!='\n')
    {
     buf[c]=ch;
    buf[c+1]=0;
    c++;
    }
    else
    {
     // Serial.print(buf);
      c=0;
      // terminate command
      if(strstr(buf,"run")>0)
      {
        run();
      }
      memset(buf,100,0);
    }
 
  }


}